Fish________ on earth for ages.
A. Existed
B. Are existing
C. Exist
D. Have existed
Chọn đáp án D
In the last two decades, space exploration___great contributions to weather forecasting.
C. Made
On July 20, 1969, Neil Armstrong ________ down onto the moon, the first person ever set foot on another planet.
When boarding the plane, many passengers were annoyed because they ________ waiting in the airport for three and a half hours.
If coastal erosion continues to take place at the present rate, in another fifty years this beach________ any more.
The phone________ constantly since Jack won the first prize this morning.
Alan took a photograph of Sandra while she________
D. Hadn’t looked
Last night Trista________ in bed when suddenly she heard a scream
B.Had read