As doctors continue (search) _______ for a cure for the ...

[ Gerunds and Infinitives ]

As doctors continue (search) _______ for a cure for the common cold, they have found some things that make people more vulnerable to catching a cold.

A. to search

B. searching

C. to search

D. “to search” and “searching”

Select your answer:
A B C D E

Other quiz:

Homonyms › View

Her face turned as red as a ___.
a. beat
b. beet

Personal pronouns + possessive adjectives + Introgative pronouns › View

____ are her hobbies? – Playing guitar and reading.

A. When

B. Why

C. What

Grammar › View

She ________ have short hair, but now it’s long.

A. used to

B. didn’t

C. use to

Grammar › View

I ____ my English homework, but I haven’t done my Spanish homework _____.

A. already do / yet

B. already did / still

C. have already did / still

D. have already done / yet