1 . 只有学会和自然和睦相处，我们才不会成为野生生物和地球的威胁。
__________ __________ we learn to exist in harmony with nature __________ __________ stop being a threat to wildlife and to our planet.

2 . ________ he is invited to someone’s home for dinner, he brings a gift, like a bunch of flowers.

A．However

B．Whenever

C．Wherever

D．Whichever

3 . It is going to be some time________he sees his father again,________ business has just been set up in the UK.

A．before; his	B．until; his
C．before; whose	D．until; whose