It is generally considered that the key ______a foreign language well is nothing but practice.
#97105
A
o learning
B
o learn
C
f learning
D
or learning
推荐题目
According to the engineer, there remain some tests _____ before the machine is put into operation.
#91175
A
carrying out
B
carried out
C
being carried out
D
to be carried out
The monument was built in honor of the explorer who was believed ________ the big river.
#88812
A
to have discovered
B
to have been discovered
C
to discover
D
having been discovered
Since you have found it hard to learn Spanish，why not try ______foreign language？
#98473
A
to learn a second
B
learning a second
C
learning the second
D
to learn the second
The discovery of the stolen car led to .
#91598
A
the thief having caught
B
the thief catching
C
the thief being caught
D
the thief to be caught