she didn’t know__________to express her ideas in English clearly in public .

单项选择题What does a house mean in the United States

单项选择题It is reasonable for people to pursue a career in fields related __________their favorite hobbies .

单项选择题The proposal__________at the meeting now is of great importance to our department .

单项选择题Students are expected to pay the loan back__________they are learning enough.

单项选择题there is no evidence__________he was on the site of(在现场） the murder.