下面的图形是由边长1厘米的小正方形拼成的，这个图形的周长是12厘米。（ ）

如图，直线AB∥CD，直线EF分别与直线AB、CD交于点E、F，EG平分∠BEF，交CD于点G．若∠EGD=116°，则∠EFD的度数为（　　）

You can ride your bike to school, but remember to be careful ____ .　　

This magazine isn't popular with the students though it____  every week.

It's difficult____  both the old and the young about the program at the same time.

The kids clapped and shouted ____ when the actor appeared.

Though he is very busy, he goes to the movies to relax____ 

The children are interested in playing the piano, so they need more____ 

The visitors ____  not to swim in this river for several times.

There are no students in the classroom. They ____  on the playground.

Thank you for____  the museum. We've learned a lot.

You must do more exercise, ____  twice a week.

对划线虚词的意义和用法判断正确的一项是（   ）
① 秦王还柱而走                  ② 图穷而匕首见
③（秦王）乃以手共搏之          ④ 侍医夏无且以其所奉药囊提轲