With the rapid development of medical science, we ________ more new drugs used in the treatment of cancer. 
#101807
A
see
B
had seen
C
will be seeing
D
would see
推荐题目
— What were you up to when your parents came in? — I__for a while and__some reading.
#104407
A
was playing; was going to do
B
played; did
C
had played; was going to do
D
had played; did
---- Flight 551 for Dallas ________. I must be off now. ------Have a pleasant trip then.
#102346
A
is being announced
B
has announced
C
was announcing
D
had been announced