To avoid the mistakes of our forefathers, the author suggests that ____________.
A.we plant more trees
B.we return to nature
C.natural sciences be taught to everybody
D.environmental education be directed to everyone
Who was the old woman ______ at yesterday's meeting?
A.we saw her B.we saw
C.we saw whom D.she was seen
what is the Roberts family?
A.We don't know.
B.They are on holiday.
C.They went to Beijing three days ago.
A.We should drink more hard water.
B.We should drink more soft water.
C.Ground water is good for the elderly people.
D.Ground water has to be treated before we drink it.
A.We will feel better.
B.We will be more defensive.
C.We will feel more anxious.
D.We will feel much angrier.
A.We Are Alone on the Internet
B.We Are Alone and Together on the Internet
C.We Are Communicating on the Internet
D.We Are in the Imaginary World of the Internet
A.we
B.us
C.ours
D.ourselves
Events enter the long-term memory if ______.
A.we think about them repeatedly
B.we are determined to remember them
C.they are experimented many times
D.they happen unexpectedly