I my key. Can you help me look for it? a. lose b. lost c. had lost d. have lost (Miễn phí)

The earth________ on the sun for its heat and light.

A. is depend           

B. depending       

C. has depend        

D. depends

On July 20, 1969, Neil Armstrong ________ down onto the moon, the first person ever set foot on another planet.

A. was stepping      

B. stepped            

C. has stepped        

D. was step

I don't feel good. I ________ home from work tomorrow.

A. am staying         

B. stay                  

C. will have stayed 

D. stayed

In the last two decades, space exploration___great contributions to weather forecasting.

A. is making         

B. has made         

C. made                 

D. makes

If coastal erosion continues to take place at the present rate, in another fifty years this beach________ any more.

A. doesn't exist      

B. isn't going to exits                        

C. isn't existing         

D. won't be existing

Alan took a photograph of Sandra while she________

B. wasn't looking 

C. hasn't looked     

D. hadn't looked