Jack wasn’t saying anything, but the teacher smiled at him _______he had done something very clever

Mr. Ma has gone to Guangzhou on business.—Really Do you know

I ________to go for a walk，but someone called and I couldn’t get away

Could you help me clean up the room — .

A new study found ______ a teacher has anxiety about maths, ______ feeling can influence how his or her female students feel about math．