_________ their final medical check, the astronauts boarded their spacecraft. 
#94285
A
Received
B
Being received
C
To receive
D
Having received
推荐题目
________ one foot before the other, slowly and purposefully, the deer walked up to ______ I was _______.
#90376
A
Put, where, seated
B
Putting, the place where, seating
C
Put, the place in which, sitting
D
Putting, the place where, sitting
Many people prefer large cars, _____large cars are safer than small ones. 
#90255
A
thinking
B
to think
C
think
D
having thought
Don’t come in unless ________.
#96189
A
inviting
B
inviting to
C
invited to
D
being invited to