1 . To make some of my landscape shots, I have traveled up to four hours away to shoot within a 10­minute time frame. _____

A．射出，放射

B．射击

C．拍摄

2 . Technology development should be guided by the right value ______ harm to humanity development.

A．in order not to do

B．to not do

C．doing

D．so as to do

3 . He came back in the late afternoon to ________ that his suitcase was gone.

A．uncover

B．undercover

C．discover

D．discovery

4 . Researchers around the world are making unremitting efforts to___________ the genome of the virus.

A．identity

B．identify

C．identifiable

D．identification

5 . Yuan Longping is the first agricultural pioneer ________ hybrid rice.

A．to grow

B．grow

C．grew

D．growing

6 . I’m glad ________ you.

A．meet

B．meeting

C．to meet

D．met