Tom sat under a tree chatting with his friends and _____ his teacher, stood up in no time.
#96223
A
seeing
B
seen
C
saw
D
to see
推荐题目
Now young people ___________to use computer to develop their ___________skills.
#95486
A
are trained/ problem solving
B
are being trained/ solving problem
C
are being taught/ problem solving
D
are taught/ solving problem
Charles Babbage is generally considered ______ the first computer.
#97960
A
to invent
B
inventing
C
to have invented
D
having invented
Paul doesn’t have to be made _______. He always works hard.
#98634
A
learn
B
to learn
C
learned
D
learning
When Jennifer stepped in quietly, her mother, ____ on the bed, was sleeping sound.
#93308
A
laying
B
lain
C
laid
D
lying