9.1.
X: Excuse me. Can I __________? It’s really important.
Y: Of course. But you need to go outside. You’re not allowed to talk on the phone in here.

(!give a sign) (!have a go) (make a call)

9.2.
X: Have you heard that Brian returned from his trip to Asia yesterday?
Y: Really? __________ .
X: Sorry, I can’t. I’m working until late evening. Another time perhaps.

(!I think he should come here.) (Why don’t we visit him tomorrow?) (!Can you stay there with him?)

9.3.
X: Mark, how long are you here for?
Y: __________

(I want to stay till Monday.) (!I’ve been here before.) (!I arrived yesterday.)

9.4.
X: It’s really hot in here. Is there air-conditioning in this room?
Y: Yes. I’ve forgotten to __________ .

(!set it out) (!put it up) (switch it on)

9.5.
X: What’s going on? You ___________ to play football here! It’s a private area.
Y: Oh, we didn’t know. Sorry!

(!do not need) (are not allowed) (!have not been able)