I love places _____________ the people are very friendly.
A．who B．which C．where D．whom
---I am sorry to have kept you ___________.
---It doesn't matter. I've just come.
A．wait B．waited C．waiting D．to wait
The number of students in our school_________ more than 2000.
A．is B．are C．has been D．Was
At the science museum，the boys and girls get to know__________.
A．what is the spaceship like
B．what the spaceship looks like
C．how the spaceship looks 1ike
D．how does the spaceship 1ook like
The more you smile, the ___________ you will feel.
A．happy B．happier C．happily D．more happily
We should study the new traffic rules and 1earn how___________ ourselves．
A．protect B．to protect C．protecting D．protected
