—I have been waiting for you so long. —Sorry, I have been in the library, _______ my friend look for some books.
#94750
A
helped
B
helping
C
to help
D
help
推荐题目
_________as one of the most important inventions of the time, the computer helps people living in different countries to do a lot of things.
#88255
A
Knowing
B
Known
C
To know
D
Know
European football is played in 80 countries, _________it the most popular sport in the world.
#97856
A
making
B
makes
C
made
D
to make
— Do you know the old man ______ on the bench over there?— He is my grandfather.
#88864
A
sit
B
sat
C
to sit
D
sitting
He picked up an envelope ____50 dollars in it.
#97352
A
containing
B
contained
C
which contains
D
which was contained
to sunlight for too much time will do harm to your skin.
#89429
A
Exposed
B
Having exposed
C
Being exposed
D
After being exposed