While he            the bus, he             a book.
#44868
A
was waiting for, read
B
waited for, was reading
C
was waiting for, was reading
D
waited for, read
推荐题目
The mayor is happy to find that many trees _______ in our city last year. 
#44369
A
plant
B
were planted
C
planted
D
are planted
English _____ as a second language in many countries. 
#44745
A
speak
B
is spoken
C
is speaking
D
is speak
Mary with his brothers           this film very much.
#44874
A
enjoy
B
enjoying
C
enjoys
D
to enjoy