Câu hỏi:

Choose the letter A, B, C or D to complete the sentences

The teacher __________ me that I had better devote more time to doing scientific researches.

Choose the letter A, B, C or D to complete the sentences

There are a lot of benefits to do __________ researches.

Choose the letter A, B, C or D to complete the sentences

A person who plays the piano is a(n) __________.

Choose the letter A, B, C or D to complete the sentences

We are trying to __________ the problem with the steam engin

Choose the letter A, B, C or D to complete the sentences

Archaeology are digging the ground to __________ that site.

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The first experiment was __________, so we need to do another one.

Choose the letter A, B, C or D to complete the sentences

The US first __________ of the Moon began with the Ranger 4 impactor in 1962.