[ 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:

Random Topics:
Main Idea and Sentence StructureGrammar and PrepositionComparatives, Superlatives, and ModalsVerb Tenses and Subject Verb AgreementPossessive NounsPresent Perfect Continuous TenseAdjectiveLet & Be allowed toGrammar - Present PerfectModals and Past TensesOther quiz:
Tenses › ViewShe’s very tired after work. I think she ………. to sleep soon.
A. went
B. will go
C. goes
General Knowledge › View
In what food is there “marble” flavor?
A. Jelly beans
B. Cake
C. Cookies
D. Fruit rollups
