The notice came around two in the afternoon ____  the meeting would be postponed.

A．when            B．that              C．whether          D．How

Much disappointed as he is _______ in the job interview, he still keeps his confidence.

A．failed            B．to have failed       C．having failed       D．Failing

_________ many countries in Latin America have been trying to reduce gaps in income, America has allowed inequality to grow.

A．While            B．Since             C．If                D．Where

The child had only _____ slight temperature，but the doctor regarded the illness as serious enough for ____ hospital treatment．   

A．/; the            B．/; /               C．a; /              D．a; the

—I expected him to be nervous before his speech, but he was as cool as a cucumber.

—He _______ it carefully.

A．could have prepared                    B．shouldn’t have prepared

C．must have prepared                     D．can’t have prepared

Classical novels often have ________ which add interest, tension, or deeper meaning to the  text; mist is one in Great Expectations.

A．lotus             B．privilege          C．syllables          D．symbols

—I’m sorry, but the manager isn’t here yet. Shall I have him call you when he comes back?

—No, I’ll call him later. If I call again in half an hour, do you think he ____?

A．arrives            B．has arrived        C．will arrive         D．will have arrived

Modern science and technology has __________ communication between people far apart.

A．made convenient                       B．made it convenient

C．made it convenient for                   D．made it convenient to

The professor could hardly find sufficient grounds _____his arguments in favor of the new theory.

A．to be based on     B．to base on         C．which to base on    D．on which to base

As there is less and less coal and oil, scientists are exploring new ways of making use  of ______________   energy, such as sunlight, wind and water for power and fuel.

A．abrupt            B．alternative         C．authentic          D．abstract