C. I go
D. I going
61. When Lily came home at 5 p.m. yesterday, her mother ______ dinner in the kitchen.
A. cooked
B. was cooking
C. cooks
D. has cooked
62. The top of the Great Wall is ____ for five horses to go side by side.
A. wide
B. so wide
C. wide enough
D. enough wide
63. -- Write to me when you get home.
-- OK, I ____.
A. must
B. should
C. will
D. can
64. He ____ lives in the house where he was born.
A. already
B. yet
C. still
D. ever
65. Don't forget ____ the window before leaving the room.
A. to have closed
B. to close
C. having closed
D. closing
66. -- ____ is your girl friend like?
-- She is very kind and good-looking.
A. How
B. What
C. Which
D. Who
67. We came finally ____ the conclusion that she has been telling lies all the time.
A. of
B. into
C. to
D. at
68. ____ you know, David has been well lately.
A. Which
B. As
C. What
D. When