Other genetic similarities suggested they all ________ a single, common ancestor about 300 years ago.
#99611
A
had
B
have had
C
have
D
had had
推荐题目
--I would why he ____so strangely these days. --Recent pressure at study may account for his behavior.
#103781
A
was acting
B
is acting
C
acted
D
acts
For the past year, he ______ a flat with others and trying to save money to open his own business.
#100393
A
has been sharing
B
was shared
C
had been sharing
D
is sharing
"The ground is wet." "Yes, didn't you know? ______for the last 20 minutes."
#104897
A
It's raining
B
It was raining
C
It's been raining
D
It has rained
Our friendship ______ quickly over the weeks that followed.
#102151
A
had developed
B
was developing
C
would develop
D
developed
I could have turned to Mr. Smith for help, but he ______ too busy then.
#104216
A
is
B
was
C
should be
D
has been