问题
Sam _____ some knowledge of the computer just bywatching others working on it
A:reduce
B:add
C:fail
D:submit
B:add
C:fail
D:submit
正确答案是：
同类题型
The reason ______ his coming to China is______ he wants to study in China．
Would you like to go the football game tonight—Oh, sorry. I _______ to see the film So Young.
______ of the people here live on rice，and the people there live _______ on noodles
I feel nervous for I’m going to take anEnglish competition tomorrow.——__________.