If he (was to come) here this afternoon, I (should ask) him to go to the party (held by) student (union).

单项选择题He is a (well-known) hardworking and clever student, and he often gets top (scores) in his class; so all his classmates (are sure) that he (studies very hardly).

单项选择题(More and more) old people whose (grown-up children) pay little attention to them (gathered) together and organize (interesting activities) for themselves.