问题
Are you ______ your son has difficulty in studying at school?
A:aware of
B:aware that
C:knowing that
D:aware of that
B:aware that
C:knowing that
D:aware of that
正确答案是：
同类题型
Nina is clever but kind of lazy. If she ___harder next term, she ___ better grades.
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When shall we go to Yunnan?—Let’s ______ it ______ Monday. [ ]