When the old man ______ to walk back to his house, the sun ______ itself behind the mountain. 
#100109
A
started; had already hidden
B
was starting; hid
C
had started; had already hidden
D
had started; was hiding
推荐题目
He has always insisted on _______ Mr. Berg instead of Justin.
#101666
A
been called
B
called
C
calling
D
being called
---When will the plane leave? ---It ________ very soon.
#101799
A
leaves
B
is leaving
C
has left
D
had left
Egg prices usually  ________       in spring when they are most plentiful.
#99486
A
are dropping
B
drop
C
have dropped
D
will drop