After the earthquake, the president _____ a three-day period of mourning, the first-ever event of its kind for ordinary people.
#12427
A
suffered
B
declared
C
confirmed
D
informed
推荐题目
Carbon dioxide, which makes a ______ between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
#13856
A
difference
B
comparison
C
connection
D
barrier
He _______ cards with his friends, but now he _______ a walk after supper.
#14230
A
used to play; is used to having
B
is used to playing, used to have
C
used to play; is used to have
D
is used to playing; is used to have
(2013·湖北，22)Carbon dioxide, which makes a________between us and the sun, prevents heat from getting out of the atmosphere easily, so the earth is becoming warmer.
#11490
A
difference
B
comparison
C
connection
D
barrier
With modern equipment，many mysteries have ________ to light in recent years.
#11546
A
bought
B
come
C
thrown
D
appeared
The train is running ______120 kilometres an hour.
#12948
A
at a speed
B
at the speed
C
at a speed of
D
on a speed of