The money will be used to keep a space vehicle on the moon busy ______ back to the earth photographs and other information about the surface of the moon.
A: to send
B: being sent
C: to be sent
D: sending
A: to send
B: being sent
C: to be sent
D: sending
举一反三
- The money will be used to keep a space vehicle on the moon busy ( ) back to the earth photographs and other information about the surface of the moon.
- When radar signals are sent to the moon, the moon, being solid, reflects them.
- He certainly deserves __________ to prison. A: to send B: sending C: sent D: being sent
- They are looking forward to_________to the lecture by the famous professor. A: send B: be sent C: being sent D: sending
- Tom insisted on his cat ______ to hospital. A: send B: been sent C: sending D: being sent