Sally took a photo of her friends while they ______ computer games.
#41060
A
played
B
were playing
C
had played
D
play
推荐题目
Regulations require__________needs special diets the cooking manager in advance.
#73952
A
who; informs
B
whom; informed
C
whomever; inform
D
whoever; inform
The scientist, __________ my father works, is about 50.
#66953
A
on whom
B
to which
C
with which
D
with whom
The treatment will continue until the patient reaches the point ________ he can walk correctly and safely.
#73330
A
when
B
where
C
which
D
whose
Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.
#67597
A
since
B
after
C
before
D
when