1、These books were very dear to him and he bought them at () expense when he was studying abroad.
A considerate
B considerable
C considered
D considering
2、It was several minutes before I was () of what was happening.
A adequate
B aware
C awake
D alive
3、What () the audience most was the ending of the movie.
A beat
B defeated
C struck
D hit
4、He made up a wonderful reason to account() his absence.
A to
B for
C up
D under