By the time Jack returned home from England, his son  _______  from college.
#100009
A
graduated
B
has graduated
C
had been graduating
D
had graduated
推荐题目
I ______ while reading the English textbook. Luckily, my roommate woke me up in time !
#104992
A
had fallen asleep
B
have fallen asleep
C
fell asleep
D
fall asleep
The price of agriculture products _______ since the beginning of last year.
#103089
A
is going up
B
had gone up
C
went up
D
has been going up