64. The price of the portable computers(手提电脑) is still so that I can’t afford to buy one.
Scientists say it may be five or ten years___________ it is possible to test this medicine on human patients.
My uncle___________ until he was forty-five.
--What ____________when I phoned you? ----I_____________and began to have a bath.
Sometimes words alone were not enough to _________pupils along the path of knowledge
Neither of them knew what was doing.