Son, you have never been abroad, I'm worried about you．
Don't worry, mom． As soon as I , I you．（ ）
A．will arrive, call
B．will arrive, will call
C．arrive, will call
D．arrive, call
They have collected more than 14，000 books since the library_____ last month．（ ）
A．builtB．was builtC．buildsD．is built
When President Xi Jinping has spare time，he enjoys_______and sports．（ ）
A．readB．readsC．to readD．reading
Doctors in the town are using the books______their studies and treat patients．（ ）
A．continueB．to continue
C．continuingD．continues
My arm is still painful，_______I'm going to see a doctor．（ ）
A．soB．forC．butD．or
The little boy has just had lunch．He _____be hungry already．（ ）
A．must．B．mustn'tC．canD．can't