[ Grammar ]
A catalytic agent such platinum may be used so that the chemical reaction advances more rapidly.
A. such
B. so
C. advances
D. rapidly

Random Topics:
Conditional Sentences Type 1Definite and Zero ArticleNoun ClausePunctuation and GrammarSimple Past TenseFuture Perfect ContinuousIndefinite and Intensive NounPhrase vs ClauseModal VerbActive and Passive voiceOther quiz:
Tenses › ViewThey ________ (go) to the beach every weekend.
A. go
B. went
C. gone
D. going
Mixed General Quiz › View
It is important to ___ your children when they do good work.
a. praise
b. prays
c. preys
Andrew had a job as a shop assistant during his ____________________.
A. working holiday
B. school camp
Grammar › View
Ali: I can’t believe I lost my wallet! Sara: ___________ it at the café yesterday?
A. Did you leave
B. Have you left
C. Were you leaving
D. Do you leave
