Put yourself in situations where you're forced to communicate in English, ______ you'll see more progress over time.
He is said ______ in the supermarket when he was doing shopping yesterday.
Pieces of bamboo or wood ________ books between 2nd and 5th century AD. A. used to formedB. used to form C. were used to formD. used to beforming
Washing machines made by China have won ______worldwide attention and Haier has become _____popular name.
Having sent several mails to apply for jobs, Susan waited for a reply, but ___ came.
— What are you going to do this weekend? — _____. If time permits, I may go to Shanghai with my friends.