5道简单的英语单选题,请英语高手进

5道简单的英语单选题,请英语高手进
31.Before he came to Japan,he had never heard a single Japanese word _____ .
A.speaking
B.speak
C.to speak
D.spoken
32.Knowledge ____ only from practice.
A.has come
B.came
C.comes
D.is coming
33.It is required that all the teachers in the department _______ on a picnic next Saturday.
A.to go
B.went
C.go
D.might go
34.We will succeed _____ learning English well if we don’t lose heart when we failed.
A.to
B.in
C.with
D.for
35.It is often more difficult to find trained men than _______ for scientific research.
A.getting financial support
B.to getting financial support
C.to get financial support
D.in getting financial support