Not until he met with the difficulty _______ the importance of group work.
Don’t worry. I’m sure you’ll succeed _______ if you work hard.
The police spotted a thief________ things in a mall at this time yesterday.
In most western countries, on April Fool’s Day, people often play __ ___ trick on each other; children especially have great ______ fun.
-I’m thinking of the test tomorrow. I’m afraid I can’t pass this time.-_________! I’m sure you’ll make it.
Competitors are allowed to take a five-minute break every hour to eat,drink or do ________ is necessary