John is very lazy. He falls ______ behind in his studies.
| A．very | B．far | C．more | D．still |
--Thank you very much.
--Not at all , I was____________ glad to help.
| A．too | B．only too | C．not so | D．much |
I would have come to see you earlier, but I__________too busy.
| A．had been | B．were | C．was | D．would be |
With summer coming on, the weather gets hot _________.
| A．day after day | B．day and night |
| C．day in and day out | D．day by day |
In Switzerland, six miles west of Geneva,___________ a collection of laboratory buildings.
| A．lie | B．are lying | C．lies | D．lays |
America was____________ was first called" India" by Columbus
| A．that | B．where | C．what | D．the place |