_)I had not believed in falling in love with somebody at first sight_______I met David on Valentine’s Day three years ago.
| A．when | B．unless | C．if | D．before |
. Remind me _______ the medicine tomorrow.
| A．of taking | B．Taking | C．to take | D．take |
. The murderer was brought in, with his hands ______ behind his back.
| A．to be tied | B．being tied | C．tied | D．having tied |
. The purpose of new technologies is to make life easier, ______ it more difficult.
| A．not make | B．not to make | C．not making | D．do not make |
All the preparations for the project ______, and we’re ready to start.
| A．completed | B．have been completed | C．had been completed | D．been completed |
. All her time _______ experiments, she has no time for films.
| A．devoted to do | B．devoted to doing | C．devoting to doing | D．is devoted to doing |