--- ___it rain tomorrow， we would have put off the visit to the Yangpu Bridge.
| A．Were | B．Should | C．Would | D．Will |
Though __________ to see the strangers, the housewife gave them a big smile and said hello.
| A．surprising |
| B．to be surprised |
| C．surprised |
| D．having surprised |
__________，he will not take off his coat.
| A．However it is hot |
| B．However hot it is |
| C．However hot is it |
| D．However is it hot |
People from all over the country __________ they are old or young, rich or poor, are doing whatever they can to help the sufferers in the earthquake-stricken area.
| A．even if |
| B．whether |
| C．no matter |
| D．whichever |
If we work hard with a strong will, we __________ overcome any difficulty，__________ great it is.
| A．must; however |
| B．need; whatever |
| C．can; however |
| D．will; whatever |
The little boy won't go to sleep __________ his mother tells him a story.
| A．or |
| B．unless |
| C．but |
| D．whether |