________ you keep moving, you'll never reach the top of the mountain.
A.If B.Although C.Unless
—I asked him a question, but he didn't reply.
—Maybe he ________about something else while you were asking.
A.thought B.thinks C.was thinking
The song Dream It Possible often reminds me that we should always try our best and never ________catching our dreams.
A.give up B.take up C.put up
—What should we pay attention to ________mistakes during the exams?
—Some details.
A.avoiding making B.avoid to make C.to avoid making
The accident happened ________ a cold morning but luckily, no one was injured.
A.at B.on C.in
There are fifty students in this class, ________ of them are boys, so the number of the boys is 30.
A.three fifth B.three fifths C.three five
