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
Lots of trees ________in our city over the years. It is becoming greener and greener!
#44811
A
are planting
B
have planted
C
will be planted
D
have been planted
At that moment,he was last __________ the room with his friends.
#44658
A
seen leaving
B
to see leave
C
seen to leaving
D
to see to leave
Computers ________widely in our daily life.
#44976
A
use
B
used
C
were used
D
are used
—What a nice classroom! —It _____ every day.
#44598
A
is cleaning
B
has cleaned
C
must clean
D
is cleaned