Please keep us __________ of any change of your address as soon as possible.
| A．informing |
| B．informed |
| C．being informed |
| D．to inform |
Once ____________ , a plan should be carried out.
| A．make | B．making | C．made | D．to make |
Being a parent is not always easy, and being a parent of a child with special needs often carries with _______ extra stress.
| A． it | B． them | C．one | D． him |
Between the two periods of classes is a break, _______ we can have a short rest.
| A．then | B．where | C．when | D．which |
Jumping out of ________ airplane at ten thousand feet is quite ________ exciting experience.
| A．an; an | B．/; the | C．/; an | D．the; the |
--- Hello, I to ask if I can book two tickets for tonight’s film.
--- Sorry, we’ve already sold out.
| A．phone | B．will phone | C．am phoning | D．have phoned |