The Korean girl can speak Chinese without difficulty because she ______ in China for years.

A. stay B. will stay C. has stayed D. stayed

Sam denied ______ computer games for hours in the net bar yesterday afternoon.

A. to play B. playing C. play D. played

You’d better ______ ask old granny for help because her memory is getting poorer now.

A. not B. don’t C. not to D. to not

One ______ easily lose his way when he visits or comes to a new place.

A. may B. must  C. need D. should

You will surely realize your dream of being a scientist ______ you give it up halfway.

A. though B. if C. unless D. since

This pet shop is losing its customers ______ its staff work slowly and often make mistakes.

A. so  B. because C. until D. although

Julia looked very ______ when she finished her performance and said thanks to the audience.

A. happily B. quietly C. lovely D. seriously

The students ran to the playground as ______ as they could to cheer for their favorite team.

A. fast      B. faster C. fastest   D. the fastest

Most of Frank’s books, usually with ______ pictures in each book, are for young children.

A. hundred B. hundreds C. hundred of D. hundreds of

The two sisters planned to borrow some money ______ their friends to start online business.

A. with B. to C. by D. from