Only by improving education and high science technology can a country become a(n)________one.
| A．advanced | B．bored |
| C．astonished | D．convinced |
--Does he always keep an appointment, Jenny'?
-- Seldom, ______.
| A．if any | B．whenever possible | C．if ever | D．when necessary |
-- I'd like to invite you to a party tomorrow evening.
-- Thank you, but ______ I'll be free I'm uncertain.
| A．while | B．if | C．when | D．whether |
Please remind ______ he said he was coming. I may be in time to meet him.
| A．where | B．when | C．how | D．what |
Adam left word with my wife ______ he would call again in the afternoon.
| A．who | B．as | C．that | D．which |
. -- Do you think Allan came by taxi?
-- No. If he had, I don't believe he ______ his bike here.
| A．would leave | B．left | C．would have left | D．had left |