问几道英语选择题~求正确答案及解答~谢谢！

A,A,C,D,B,B,A
1. A, the best answer should be , but there's not
2. A, Silk is produced in Suzhou. Sentence form (silk is uncountable noun)
3. C, I always speak that lar...
4. D, future simple+if+normal tense
5. B, represents it must be for future, and according to the structure, it's B
6. B, He hasn't ridden a horse before, has he? same way
7. A, You don't have to work for 10 hrs yesterday. same procedure

a
happen没有被动形式
a
丝绸被产吧
c
d
时间条件状语从句，主句将来时，从句一般现在时
b
直接引语变间接引语
时态往后退一个
b
a

1.a 2.a 3.c 4.b 5.b 6.a 7.a

第一题选A

1 A
2 A
3 C
4 D
5 B
6 B
7 A

AACDBBA