Question 32: John and I ___________ (STUDY) at the same school and we ___________ (BE) great friends
ever since.
Question 33: Don’t wait up for me. I can’t tell when I ___________ (BE) back.
Question 34: Here you are! What you ___________ (DO) here at this time of night?
Question 35: Goodbye, Ned. I never ___________ (FORGET) you. I ___________ (MISS) you more than
anyone I ever ___________ (KNOW) in my life.
Question 36: The secretary ___________ (TYPE) all the documents long before the manager comes.
Question 37: You see, I ___________ (DO) this kind of thing for the last 30 years.
2
Question 38: When we ___________ (GET) to the restaurant, we ___________ (FIND) that nobody
___________ (REMEMBER) to reserve a table.
Question 39: I could tell at a glance that the pile of letters on my desk ___________ (DISTURB) while I
___________ (BE) out.
Question 40: As soon as she arrived in England, she ___________ (FIND) that the language ___________
(BE) quite different from the English that she ___________ (LEARN) at school.
help me please!

Question 21: I understand you ___________ (HAVE) an unpleasant experience at the weekend. What exactly
___________ (HAPPEN)?
Question 22: “Good night. It ___________ (BE) nice to meet you,” he ___________ (SAY) and ___________
(GO) off to his car.
Question 23: I will graduate in June. I will see you in July. By the time I ___________ (SEE) you, I
___________ (GRADUATE).
Question 24: We ___________ (ALREADY FINISH) that work by the time you get back.
Question 25: When I arrived at the meeting, the first speaker just ___________ (FINISH) speaking and the
audience were clapping.
Question 26: The traffic was very heavy. By the time I ___________ (GET) to Mary’s party, everyone
___________ (ALREADY ARRIVE).
Question 27: “You ___________ (FIND) the key which you ___________ (LOSE) yesterday?” – “Yes. I
___________ (FIND) it in the pocket of my other coat.”
Question 28: Tomorrow I’m going to leave for home. When I ___________ (ARRIVE) at the airport, Mary
___________ (WAIT) for me.
Question 29: Sarah has lost passport again. It is the second time this ___________ (HAPPEN).
Question 30: When the alarm rang, Jack ___________ (JUMP) out of bed quickly.
Question 31: It’s no use getting impatient. The plane ___________ (NOT ARRIVE) until the weather
___________ (CLEAR) up.
 

Question 4: Nicole ___________ television a lot when she ___________ sick last year.
A. watched – was B. had watched – had been
C. was watching – was D. had been watching – was

Mn giúp mk vs ạ

Bài 1: Cho đường tròn (O, R) và điểm M nằm ngoài đường tròn đó. Gọi MA, MB là hai tiếp tuyến với đường tròn tại A và B. Tính số đo của góc ở tâm tạo bởi hai bán kính OA và OB nếu:

a) ∠AMB = 70^o

b) MA = R

c) MO = 2R

cho 51 gam dung dịch H2SO4 0.2M có D=1,02g/ml vào dung dịch  NaOH 4%.Tính khối lượng dung dịch NaOH vần dùng

Mọi người giải giúp mình với ạ!