When they knew there was a panda in the zoo, the children could ___ wait to see it

ou ________ be sitting in thiswaiting room. It is for women and children only.

Mary is hard-working. She works harder than classmates in her class.

A person may often ______ the different stages(人生阶段)of sadness, shock, anger, and so on.

I’ve got to the position ________ hardwork.