The boys followed the marks that they ________, until finally they found their way back to the campsite.
#100125
A
left
B
have left
C
had left
D
have been left
推荐题目
---- Look! Everything here is under construction. ---- What’s the pretty small house that ____________ for?
#101031
A
is being built
B
has been built
C
is built
D
is building
--- Mum, where are my gloves? Is the pair of gloves ______ mine?--- Yes. You have to wear another pair.
#100870
A
washing
B
have washed
C
having washed
D
being washed
The elderly _________ good care of in public places like supermarkets and airports; they are likely to get lost.
#102324
A
can have been taken
B
ought to be taking
C
must be taken
D
should take
Father _____for London on business upon my arrival, so I didn’t see him.
#99289
A
has left
B
left
C
was leaving
D
had left