1/ “I will stay at home tomorrow,” John said.

A. John said that he would stayed at home the following day.

B. John said that he will stay at home the following day.

C. John said that he would stay at home the previous day.

D. John said that he would stay at home the following day.

6. We haven’t had any fruit for five months.

->The last time …

-> We last …

1. How long is it since you sold that car?

  When _____________________________________________?

2. How long is it since you last saw her?

à When _____________________________________________?

3. How long is it since you ate some meat?

 When _____________________________________________?

4. How long have you worked as a waiter here?

When _____________________________________________?

1. I’ve never met such an intelligent boy

 This is the most intelligent boy I have ever met

2. I have never met such a famous person before.

It is the most famous person ……………………………………………………

3. We have never got such a big sum of money before.

This is……………………………………………………

4. We have never seen such a small boy before.

That is……………………………………………………

1.     She has lived here for ten years.

It’s ________________________________

2.     I haven’t seen him for two months

It’s __________________________

3.     The students have studied online for four months.

It’s ____________________

4.     We haven’t been out for five months.

It’s __

5.     She hasn’t got any help for a year.

It’s ________________________________

6.     We haven’t heard from her for three years.

It’s ____________________

Một clắc đơn có chiều dài l đặt tại nơi có gia tốc trọng trường g thì chu kì dao động nhỏ là T. Nếu đưa con lắc này đến vị trí có gia tốc trọng trường chỉ bằng 50% so với vị trí cũ thì chu kì dao động T’ của con lắc lúc này là:

A.T’= \(\sqrt{50}\)T                                        

B.T’=50T               

C.T’=2T                                                

D.T’= \(\sqrt{2}\)T

1.     Một con lắc lò xo ( k=200N/m, m= 200g)  dao động trên đoạn thẳng dài 6 cm. Gia tốc cực đại của con lắc có giá trị:

A.6 cm/s²                                                                     

B.3 cm/s²                       

C.6 m/s²                                                

D.3m/s²