I don’t care about the salary offered by the company. What I need is a (an) post.[ ]

What’s this —It’s a machine which was invented in__________century in China.

Tom’s decided to devote all he could ________ his English before going abroad.

urse attracts over 100students per year, ________ up to half are from overseas.

下列各句中没有语病的一句是（ ）