On this happy occasion, I'd like to say that we are _____ much obliged to you for your kind cooperation.
Since Tom ______ downloaded a virus into his computer, he can not open the file now.
It is not socially ____for parents to leave children unattended at that age.
.I hope I will not be called on in class as I’m not yet____prepared.
You can see the stars on a clear night, but in the daytime they are ____ .
.—Do you need any help, Lucy? —Yes. The job is ____ I could do myself.