.
1931 was the year ________ a German company began to make the first tape recorders, _______ could record and play sounds on a tape wound around a round object.
A that ---Which B which --- That C when---which D when--- that
.
--- I didn't attend the meeting yesterday.
--- But you _______.
A ought to B should to C ought have D should have
.
A small car has the great _____ of being cheaper to run.
A interest B benefit C usefulness D advantage
.
The Internet __________ of great value to us during our project.
A was proved B proved C was proving D was being proved
.
Don't ________ the drug on animals.
A try out B watch out C make out D take out
.
The situation demanded that he ___________ present.
A was B is C be D were
