Can you tell me ________ in your class?

1. A.
   who the tallest is
2. B.
   who is the tallest
3. C.
   who is more taller
4. D.
   who is taller

—Hi, Mary. __________?
—Not so well. I can’t keep up with the other students.

—Hi, Mary. __________?

—Not so well. I can’t keep up with the other students.

A．How long have you studied chemistry

B．Who is teaching you chemistry

C．How is your chemistry study going

D．Where are you learning chemistry

用括号内所给动词的适当形式填空，必要时可加助动词或情态动词。

Being safe in your everyday life needs knowledge （知识）．If you remember the following information, your life   1   （be） much safer．

Always notice the environment around you．You shouldn’t walk alone outside．Make sure where the public phones are．If anything dangerous   2   （happen）, you can find them easily．

Your bag should  3  （put） towards the front of your body instead of   4   （carry） it on your back．

If you   5  （follow）by someone whom you don’t know, cross the street and go to the other side．Let the person who is after you know that you   6   （notice）he or she is following you．Next, don’t go home at once． You are safer in the street than you are alone at home or in the elevator．

If you have to take a bus to a place far away, try   7 （get）to the stop a few minutes early before the bus leaves．This stops the other people from   8  （watch） you．On the bus, don’t sit alone．Sit behind the driver or with other people．Please remember not to sleep．