難度:★ 考點(diǎn):介詞的使用
1. Bill has made great progress _____________the help of his teachers.
A. for B. with C. under
2. Her mother goes to work ______ bus every morning.
A. by B. at C. on D. in
3. Linda is not good at Chinese, but she passed the exam ______ the help of her classmates.
A. with B. under C. without