问题

32.So often ______ in recent years that it has almost become a rule

A:has this happened
B:this has happened
C:is this happening
D:for this to happen

正确答案是：

同类题型

I can hardly believe such a little boy gets up______ 5:00 ______ 6:00 every morning.— What a hard-working boy!

Jack, you seem in high spirits.—__________ We won the match 4-0.

Daddy, can you fix the toy car for me— Well, you can do it yourself. Read these carefully first.

Do you know _______ they got to know each other? —- It was last year_______ they both taught Chinese in Scotland.

Are you in _____ –Yes , I am.