Chủ đề:
Chương IV. Hiđrocacbon. Nhiên liệuCâu hỏi:
dung dịch axit axetic tác dụng được với dãy chất nào sau đây?
a. Cu, MgO,Na2SO4
B. KOH,Na2SO3,Cu
C. Na2SO4,Mg,KOH
D. Mg,NaOH,CaCO3
Simple Past | Peresent Perfect Simple | |
I/ have/ a/car | ||
You/buy/flowers | ||
He/see/a cat | ||
They/take the bus |
giúp mình với ạ
6. What will you do if you..................... (not / go) away for the weekend ?
7. The game ....................._(start) if you put a coin in the slot.
8. We’ll have to go without John if he ( not arrive) ..................... soon.
9. If she ..................... (accept) your card and roses, things will be very much hopeful.
10. If she (come) ..................... late again, she’ll lose her job.
11. If he (wash) ..................... my car, I’ll give him $20.