Charles is believed_______ the floor yesterday; he is always helping others silently. 
#97223
A
to sweep
B
to have swept
C
having swept
D
swept
推荐题目
______, a small advertisement held my attention, which read “Easy job. Good wages. No experience necessary.” 
#95241
A
Looking through the newspaper
B
While I was looking through the newspaper
C
To look through the newspaper
D
Looked through the newspaper
The oceans and seas ______ the islands are more or less polluted.
#91842
A
surrounding
B
surrounded
C
are surrounded by
D
are surrounding
Did you hear the sound like that of a door _____?
#98298
A
burst
B
to burst in
C
burst in
D
to be burst in