They____on the program for almost one month before l was arranged to help them. Now, we____on it as no result has come out.
#99542
A
had been working: are still working
B
had worked; were still working
C
have been working; have worked
D
have worked; are still working
推荐题目
—You seem to be familiar with New York. —I _______ there for three years. It’s great to be back.
#99770
A
live
B
had lived
C
have lived
D
lived
With the help of high technology, more and more new substances ___in the past few years.
#101737
A
discovered
B
have discovered
C
had been discovered
D
have been discovered
One of my friends asked me to help him with his lessons this weekend, and thus __ my plan.
#101920
A
ruined
B
ruining
C
to ruin
D
ruins
--- Oh! You bumped me! --- I am sorry. But I to catch the coming bus.
#99506
A
try
B
tried
C
am trying
D
was trying
Cathy is taking notes of the grammatical rules in class at Sunshine School, where she ______ English for a year.
#102013
A
studies
B
studied
C
is studying
D
has been studying