Because the company was doing more business, it was necessary to ______ the factory.

单项选择题The flat where we live ______ three rooms only.

单项选择题______ your homework and make sure that you don t ______ any mistakes.

单项选择题______ English, she is studying Japanese and French.

单项选择题Babies often ______ down when they are learning to walk.

单项选择题He is very ______ in using money.