单选题 He made ______ for an old person on the bus.

单选题 Study hard, ______ you won't pass the exam.

单选题 We should have breakfast every day to keep ______.

单选题 I'd like to go with you, ______ I'm too busy.

单选题 If you don't feel well, you'd better ask a ______ for help.

单选题 Don't ______. He is OK.

单选题 He was very tired, so he stopped ______ a rest.

单选题 Mary is interested ______ hiking.

单选题 You'd ______ give up smoking.