I like hiking in the forest because the air is pretty ______．（ ）
A．freeB．dirtyC．pollutedD．fresh
Warm words can touch not only your heart but also ．（ ）
A．meB．myC．myselfD．mine
It's not necessary to find a friend who is the same you．（ ）
A．inB．asC．toD．from
Could you tell me ？
Sure， I'll come back in three days．（ ）
A．when will you come back
B．how long have you stayed there
C．why you went there
D．how soon you will come back
The Forum（论坛）on China﹣Africa Cooperation Meeting will take place in Beijing this year．
Yes． I hear thousands of guests to the meeting then．（ ）
A．will be invitedB．will invite
C．are invitedD．invite
The second C919 large passenger plane its first flight at Shanghai Pudong International Airport on December 17th， 2017．（ ）
A．completesB．completed
C．has completedD．was completing