The researchers ………………… many experiments to find the most effective ...

[ Grammar and Vocabulary ]

The researchers ………………… many experiments to find the most effective materials.

A. considered

B. confirmed

C. concerned

D. conducted

Select your answer:
A B C D E

Other quiz:

Verb Tenses › View

Form a sentence using simple past tense: They ____________ (go) to the beach last summer.

A. They go to the beach last summer.

B. They going to the beach last summer.

C. They went to the beach last summer.

D. They goes to the beach last summer.

Grammar › View

We _____ have any plans for the weekend.

A. Do

B. Does

C. Don’t

D. Doesn’t

Grammar › View

I used __________________ basketball during my college years.

A. playing

B. to play

Loose vs. Lose › View

Your shoelaces are …