I’m so busy. If I ______ time, I ______ have agood rest.

Having mastered the technology of manned spacecraft, China became the third country in theworld ______ manned spaceflight independently.[ ]

下列各句中，没有语病的一句 （ ）

Three-fourths of the homework _____today.

I didn’ t expect to see you studying at the library so early in the morning.— , huh