If I hadn’t stood under the ladder to catch you when you fell, you _____ now.
| A．wouldn’t be smiling | B．couldn’t have smiled | C．won’t smile | D．didn’t smile |
He went from door to door, _______ waste papers and magazines.
| A．gathering | B．gathered | C．gather | D．being gathered |
. _______ the office, the foreign visitors were shown round the teaching building.
| A．Having shown | B．Showing | C．Has shown | D．Having been shown |
With winter _______ on, it's time to buy warm clothes.
| A．came | B．comes | C．come | D．coming |
Deeply _______, I thanked her again and again.
| A．being moving | B．moved | C．moving | D．to be moved |
_______ the house on fire, he dialed 119.
| A．To see | B．Seeing | C．Having seen | D．Being seen |