No one knew what        because of the thick fog.
#39880
A
he had happened
B
had happened to him
C
had he happened
D
has happened to him
推荐题目
The books______ into many other languages last year.
#38279
A
translate
B
translated
C
are translated
D
were translated
 Three bridges ________ over the river five years ago.
#36293
A
built
B
build
C
were built
D
are built
—Where is Jack? —I noticed that he ________the teacher’s office just now.
#38399
A
went into
B
goes into
C
was going into
D
is going to
----      your son        a computer?------No.He        one this summer vacation.
#36548
A
Has; bought; will buy
B
Did; buy; bought
C
Does; buy; bought
D
Does; buy; will buy