—Where is Mike?  —He’s _______ the pool.
#40102
A
swim at
B
is swimming at
C
swimming at
D
swim
推荐题目
–Did you go to Jack’s birthday party? -- No, I ________. 
#40040
A
am not invited
B
wasn’t invited
C
haven’t invited
D
didn’t invite
---Is that Jack speaking?  ---Sorry, he _______ in. He _______ back in half an hour.      
#41814
A
isn’t; will be
B
wasn’t; will
C
isn’t; is
D
wasn’t; was
What ________ you ________ at this time yesterday?
#37876
A
did, do
B
have, done
C
were, doing
D
are, doing