72. We couldn’t read the notice on the board because several people were standing _______ it.

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we couldn’t catch up with them and we couldn’t catch up with them so we couldn’t catch up with them but we couldn’t catch up with them

hadn’t read hasn’t read wouldn’t read didn’t read

could you couldn’t I couldn’t we could we

couldn't have lived couldn't live don't live didn't live

could you couldn’t I couldn’t we could we

couldn’t wouldn’t needn’t mustn’t

couldn’t wouldn’t needn’t mustn’t

could you couldn't I couldn't we could we

could you couldn’t I couldn’t we could we

A. mustn’t mustn’t have gone couldn’t go couldn’t have gone

in front of in the front of at the back of in back of

hadn’t left; can’t didn’t leave; couldn’t have got hadn’t left; couldn’t get hasn’t left; couldn’t get

could we couldn't you couldn't we could I

could you couldn’t I couldn’t we could we

could you couldn’t I couldn’t we could we

could you couldn’t I couldn’t we could we

one can’t read enough one can read too many books all that one reads is not bad all that one reads is enough

Were it not for; couldn’t enjoy Had it not been for; couldn’t enjoy But for; can’t have enjoyed Without; couldn’t have enjoyed