3道英文题目，简单说一下原因

the chair man asked _____to write their questions on a plece of paper and send them to the front.
A,the present member B,the member presently C,the members present D,the presently members
选C
【the present member 目前的成员】
【the members present当时在场的成员】

20,chinese _____(are或is) proud of the hast of the 29th olympic games.
【are】这里是说全中国人都为成为第二十九届奥运会主办国而自豪

21,there______(is或are) a little sheep on the hill.
【is】 there be 的就近原则 ，且a sheep是单数。

19.C。members不止一个人，要加s。同时present是后置定语，出席的。
20.are。chinese是中国人，复数。
21.is。 a sheep是单数。