The director wants to make sure no one will solve the mystery until it ________ at the end of the horror film. 
#38260
A
is explained
B
will be explained
C
explains 
D
has explained
推荐题目
 We _____ more than 1,600 words since we began to learn English.
#36222
A
learn
B
have learned
C
learned
D
are learning
—What has happened in your hometown?— Great changes _____ in my hometown recently.
#41510
A
have been taken place
B
have taken place
C
have been happened
D
was happened
Both the parents and James           London. They will come back soon.
#40217
A
has been to
B
have been to
C
has gone to
D
have gone to
—Mr Wang’s never been to Canada , has he?—________. He went there on business last week.
#41714
A
No , he hasn’t
B
Yes , he has
C
No, he has
D
Yes, he hasn’t