He is very tired，so he needs some time __________ duty for relaxation and rest．
A．throughB．from
C．withD．off
I've known Sarah for nearly ten years．She __________ once my customer．
A．isB．has been
C．wasD．had been
—You look sleepy today．
—__________ not to miss the flight，I didn't dare to close my eyes the whole night
A．RemindedB．Being reminded
C．RemindingD．Having reminded
They will run an after-class club __________ kids can have fun and learn how to protect themselves．
A．thatB．whenC．whereD．what
They have leading experts in this field，and that's __________ they've made important progress．
A．whereB．why
C．whetherD．who
I've heard that preparations __________ for the coming festival．Let's give them a hand．
A．are being madeB．have been made
C．are makingD．have made
