Studies have long shown that our heart rates and anxiety levels rise and fall ______ on the speeds of the music we hear.
| A．depends | B．depended |
| C．depending | D．to depend |
While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth.
A now and then B.over and over C.up and down D.here and there
---I bet you will go on a trip after graduation.
---______. I can’t wait!
| A．Surely I will | B．Go ahead | C．Take it easy | D．My pleasure |
Cole Bettles ______ by a number of universities when he received an e-mail from the University of California last month.
| A．had been rejected | B．has been rejected | C．has rejected | D．was rejecting |
Rare species in the world, ______ by hundreds every year, must be jointly preserved by all countries, or humans will encounter ecological disaster in the near future.
The elderly patients still prefer the traditional way, ______ online booking system is supposed to be convenient and fast.
| A．while | B．though | C．unless | D．as |