He ______busy yesterday,or he______you with your experiment.
#104366
A
was;had helped
B
was;would have helped
C
had been;would have helped
D
were;would have helped
推荐题目
 My new pen __________.Who __________ have taken it?
#99071
A
has been disappeared; can
B
has disappeared; could
C
is missing; should
D
has been lost; may
He said to us that he ____the teacher’s instructions.
#100425
A
must follow
B
followed
C
follow
D
must have followed
If nothing ________, the oceans will turn into fish deserts.
#100592
A
does
B
had been done
C
will do
D
is done