-- Turn off the TV, Jack. _______ your homework now?
-- Mum, just ten more minutes, please.
A. Will you be doing B. Should you be doing
C. Shouldn't you be doing D. Couldn’t you be doing
_______ with all sorts of affairs, the manager had little time to have a good sleep.
A. Occupying B. Being occupied
C. Occupied D. Having occupied
I was going to pay by cash when it suddenly occurred to me _________ I had left my purse at home.
A. whether B. what
C. that D. where
China’s BeiDou Navigation Satellite System, whose positioning ________ will reach 2.5 meters by 2020, will soon provide services for more countries.
A. accuracy B. category
C. function D. reference
This semester our school offers many optional courses for the students, _______ appeals to many students.
A. each of which B. all of whom
C. each of whom D. all of which
-- I have heard Mr. Morgan will be here at 4:00 pm. next Thursday.
-- No, he _______ at that time.
A. was boarding B. would be boarding
C. will be boarding D. is boarding
