Physics is difficult ____.
#98661
A
to be learned
B
to learn
C
to be learning
D
to be learn
推荐题目
The children all turned ________ the famous actress as she entered the classroom.
#88836
A
looked at
B
to look at
C
to looking at
D
look at
 I saw Tom ______ into the classroom without ______.
#96668
A
slide; found
B
sliding; find
C
to slide; being found
D
sliding; being found
The ability _______ an idea is as important as the idea itself.
#95430
A
expressing
B
expressed
C
to express
D
to be expressed
We are invited to a party______ in our club next Friday. 
#93581
A
to be held
B
held
C
being held
D
holding