It's said that Chongqing Metro Line 9 into operation recently.
A.is put B.will be put C.has been put D.has put
If one of your friends sends you a message to borrow money on the Internet, you’d better phone him first to make sure of that.
A.recently B.directly C.finally D.politely
With the of society, our environment is becoming worse and worse. So we should do what we can our environment.
A.develop; protect B.developing; to protect
C.development; to protect D.development; protect
Jack was helping his mother when the rain began to beat heavily______the windows.
A.against B.across
C.through D.around
Dale, trousers are your sister's. are on the bed.
A.this; Yours B.these; Yours C.this; Your D.these; Your
Zhong Nanshan, doctor, became a hero again in the fight against COVID-19（新冠肺炎) in the spring of 2020.
A.a 83-year-old B.an 83-year-old C.an 83 years old D.a 83 years' old
