1 . “Thank you for letting me observe your classes. It was an unusual experience,” the email began,_______got my heart racing. (用适当的词填空)

2 . Wildcats are the UK’s rarest native mammal and ______ (hunt) to extinction in most parts of Britain for their thick hair in the past decades. (所给词的适当形式填空)

3 . Don’t choose activities like running or lifting weights at the gym just _______ you think that’s what you should do. Instead, pick activities that fit your lifestyle, abilities, and taste. (用适当的词填空)

7 . Shenzhen Bay Park, ______ migratory birds take a rest every year, attracts a lot of birdwatchers.

A．where

B．which

C．when

D．that