The fans ______ to see the pop singer the whole afternoon, and they won’t leave until he turns up.
#99793
A
have been waiting
B
waited
C
had waited
D
would have waited
推荐题目
---Remember the first time we met, Mary? ---Sure.You ______ in the supermarket.
#103848
A
had shopped
B
have shopped
C
were shopping
D
shopped
Unfortunately, when I dropped in, Professor Smith ________, so we only had time for a few words. 
#104738
A
has just left
B
had just left
C
just left
D
was just leaving
 ---- Why does the river smell terrible? ---- Because large quantities of water______.
#99913
A
have been polluted
B
has polluted
C
has been polluted
D
have polluted