The tetracyclines, _____ antibiotics, are used to treat infections. ...

[ Grammar for TOEFL ]

The tetracyclines, _____ antibiotics, are used to treat infections.

A. are a family of

B. being a family

C. a family of

D. their family is

Select your answer:
A B C D E

Other quiz:

Grammar › View

There are … big advantages to living in this city.

A. some

B. any

Modal Verbs › View

I’m sure I left my keys on the table. My keys __________________ be on the table.

A. might

B. must

C. can’t

D. could

Tenses › View

‘We were studying in Bangkok’

A. Past Simple

B. Past Continuous

C. Future Perfect

D. Present Continuous

Grammar: Simple Past and Past Continuous › View

You look tired. I think you should go to _____ bed early.

A. the

B. ∅

C. a