In order to find the missing boy, the young couple all they can over the past twenty-four hours.
#101189
A
do
B
did
C
have been doing
D
had done
推荐题目
John _______ for London this afternoon and his flight _______ off at 18:20.
#101809
A
is about to leave; will take
B
is leaving; takes
C
is going to leave; is taking
D
is to leave; is about to take
—Why ! Where's my passport? Maybe I left it on the plane． --My Goodness ! You ____________ things behind．
#103717
A
had never left
B
didn't leave
C
never left
D
haven’t left
The girl who ___ beautiful eyes _____a prize in yesterday’s singing contest.
#100237
A
has…wins
B
had…won
C
having…won
D
has…won
The past two years _______ a sharp rise in oil price，which adds to the burden of auto transportation industry.
#100085
A
witnessed
B
witnesses
C
is witnessing
D
has witnessed
― I guess you were in a hurry. Look! You _______ your sweater inside out.
#102598
A
hadworn
B
wore
C
arewearing
D
werewearing