Andy practiced hardest among us and he won first prize in the competition．
A dream can't come true hard work．（ ）
A．byB．acrossC．overD．without
It's too hot today．
Yes． Why don't you your jacket？（ ）
A．put onB．put upC．take offD．take after
Students in our school ________ know shouting is not allowed in the library．（ ）
A．canB．mayC．mustD．need
The little boy his seat to an old lady on the crowded bus．（ ）
A．lentB．offeredC．tookD．brought
You'd better make a good plan________ you take a holiday．（ ）
A．beforeB．duringC．untilD．after
A smile costs ， but gives so much．（ ）
A．somethingB．anythingC．nothingD．everything