We must stop ________ plastic bags (塑料袋).—You’re right. It’s bad for our environment(环境).

(2013·乌鲁木齐高三第一次诊断性测验)That scientist ________ work is successful has been made a model worker.

, wouldyou like a coffee to go with your sandwich －Sure, it________

mind my smoking here — ________ Look atthe sign! It says, “No smoking”!

Mr Ma is the person _____ we learned how to write with brushes.