Chọn từ thích hợp điền vào chỗ trống : Hoá trị, kí hiệu hoá học, nguyên tử, phân tử, nhóm nguyên tử, đơn chất, hợp chất
a)......................................... là con số biểu thị khả năng liên kết của nguyên tử hay.............................. với nguyên tử của nguyên tố khác
b) Công thức hoá học của .............................. chỉ gồm một..............................
Complete the sentence with one preposition of time: in, at, on, after, before, between
1. Minh was born................. Hue.............. 200
2. What do you usually do................. Sunday?
3. They got married............ 20 December 2002
4. I'm usually free.............. 8pm and 10pm
5. The course begins................. 12 May and sometimes ends.............. August
6. She doesn't like travelling...................night by car
7. I'll live............... 7 o'clock tomorrow, so I should call me..........?
8. Do you give each other present.................... Christmas?
9. There are usually a lot of parties...................... New year's Eve
Chia từ trong ngoặc bằng thì hiện tại đơn và thì hiện tại tiếp diễn
1. My children (go)..................to school by bike
2. We (go)..................to supermarket to buy some food
3. Mr. Hiên (go)...................on business to Ha Noi every month
4. Hà (like)....................coffee very much, but I ( not like)....................it
5. I (love).................cats, but I (not like)......................dogs
6. Who you...................... (wait) for Nam? - No, I..................(wait) for Mr. Hai
7. My sister (get)...............dressed and (brush).....................her teeth herself at 6.30 everyday
8. Mrs. Smith (not like)......................in downtown. She (rent)................in an apartment in the suburb
Sentences transformation
1. What was your former teacher like ? - She was very nice
=> What................................
2. Trang enjoyed talking about her favourite sport
=> Trang was......................
3. My friend swims very well
=> My friend is a................
4. Tam is very strong. He can't ride a motorbike
=> Tam is not...................
5. No one in my class is more beautiful than her
=> She is the.......................
Put the verb in bracket into the present continuous tense or simple present tense :
1. What ( make) ........................that terrible noise ?
2. What................ She (do)..... ...in the evening
3. The last train ( leave) ...........................the station at 11 o'clock
4. Lan ( make )....................a dress for herself now
5. I am afraid ( break)..............one of your coffee cups
6. Don't worry. I ( not like) ............................that set anyway