Remember _______ out for the right light.
| A．looking | B．to look | C．looked | D．look |
I enjoy ________ visitors around.
| A．showing | B．to show | C．shown | D．show |
Thank you for _______ us around Radio Beijing.
| A．to take | B．take | C．taking | D．taken |
All of us found ________difficult to work out the maths problem.
| A．what | B．that | C．which | D．it |
The house price is going up _______.
| A．year and year | B．year after year | C．year to year | D．year by year |