1.The teacher could find no ____ with his pupil's work.

1.The teacher could find no ____ with his pupil's work.
A.blame B.mistake C.failure D.fault
2.It is a long time _____.
A.when I saw you last
B.then I saw you last
C.for I saw you last
D.since I saw you last
3.He knew that was William ____ in at the gate.
A.come B.coming C.to be come D.to come
选择哪个?为什么?