I left for the office earlier than usual this morning _____ traffic jam.
Have you ever listened to the song Yesterday once more, ________ singer died in her early years?
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 formed B. used to formC. were used to form D. 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.