She________ know the answer, but I'm not sure.
| A．maybe | B．may be | C．may | D．must |
Don’t write the letters ______ pencil but ______ ink.
| A．with; with | B．in; in | C．in; with | D．with; in |
Children wake up very early ____ the morning of Christmas Day.
| A．in | B．on | C．for | D．at |
____ a cold winter morning, I met her in the street.
| A．In | B．On | C．At | D．For |
Why did you get up so early ___ this morning.
| A．on | B．/ | C．at | D．in |
The Eiffel Tower __________ for the 1889 Paris Expo. It is a symbol of the city now.
| A．built | B．was built | C．has built | D．was building |