—Do I need to give a tip if I eat at a fast food restaurant in the United States?
—Yes , it’s a common to tip waiters in a restaurant.
| A．sense | B．custom | C．method | D．practice |
When Miss Smith asked me a few questions in class yesterday, my mind happened to be wandering. As a result, I had to give her awful ____________ responses.
| A．offbeat | B．off-line | C．offhand | D．off-key |
________ surprises us most is that she doesn't even know _________ the difference between "speak" and "talk" lies.
| A．What; where | B．What; which | C．What; what | D．That; where |
I’m sorry I got caught in the traffic；________, I could have been here sooner.
| A．besides | B．although | C．anyway | D．otherwise |
________ it clear to us that he didn’t agree with us, the manager left the meeting room.
| A．To make | B．Making | C．Made | D．Having made |
This problem may lead to more serious ones if ________ unsolved.
| A．left | B．making | C．remained | D．keeping |