问题

ll my attention _____ my homework, Ididn’t even notice my father standing by me.

A:to fix on
B:fixed on
C:fixing on
D:to be fixed on

正确答案是：

同类题型

. —Learning a language isn’t easy. Ittakes time.—I agree. ________. There is no shortcut.

下列各项中词语的注音和字形完全正确的一项是（）

You don’t need to describe herIher several time

Please come in and have a cup of tea.—— _____________.

a poorly learned man, but he acts asthough he _____