Finally, people found computers ________.
A. useful B. are useful C. don’t useful D. doesn’t useful
They still can’t decide ________ with our difficulties in learning math.
A. what to deal B. how to do C. what to solve D. how to deal
Everybody tells us we can’t pass the exam ________ we study hard.
A. because B. or C. unless D. and
– How do you learn English, Tony?
– I usually practice English ________ chatting with my American friends.
A. in B. with C. on D. by
His father is engi
neer.
He designed such useful
machine
A．a an B. an a C. an an D. a a
Jenny is on holiday now. I wonder ______________________.
A. when she will come back B. when she came back
C. when will she come back D. when did she come back
