The book has helped me greatly in my daily communication, especially at work ________ a good impression is a must.
| A．which | B．when | C．as | D．where |
_____to reach them on the phone, we sent an email instead.
| A．Fail | B．Failed | C．To fail | D．Having failed |
He let me repeat his instructions_____ sure that I understood what was _____ after he went away.
| A．to make; to be done | B．making; doing | C．to make; to do | D．making; to do |
— It’s the classroom! So you ______ know eating is not allowed here.
— Oh, sorry.
| A．need | B．will | C．may | D．must |
—You don’t look well． Are you ill?
—No, the mid-term exam is coming and Ireading until midnight．
| A．stayed up | B．am staying up | C．have stayed up | D．will stay up |
Have a good look round the room to make sure you ______ everything.
| A．had packed | B．pack | C．have packed | D．are packing |