Earth is believed ______ by an object the size of Mars at some point in the distant past before its surface cooled．
#96481
A
to be hit
B
to have hit
C
to have been hit
D
to hit
推荐题目
It was __________ computer games that cost the young man a lot of precious time that heshould __________ on his lessons．
#93673
A
to play; be spending
B
playing; spend
C
played; have spent
D
playing; have spent
________ an astronaut into space in 2003, China became the third country to send a woman into space in June, 2012.
#88764
A
Having first put
B
To have first put
C
First putting
D
Being first put
The first textbooks _____ for teaching English as a foreign language came out in the 16th century.
#98254
A
being heard
B
to be written
C
being written
D
written
In 1636, Harvard（哈佛大学）is one of the most famous universities in the United States.
#94015
A
Being founded
B
It was founded
C
Founded
D
Founding
He hasn’t decided which hotel ___. Nor have I .
#97800
A
to stay
B
for staying
C
to stay in
D
for staying in