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 |
His letter was so confusing that I could hardly make any ___ of it.
| A．explaination | B．meaning | C．sense | D．guess |
In that country, you can see the temple ___ the 12th century.
| A．dated from | B．dated back to | C．belonged to | D．dating from |
Only when I left my parents for Italy ___ how much I loved them.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
It was not until 1920 ___ regular radio broadcasts began.
| A．while | B．when | C．that | D．since |
The reason _____ he explained is ___ she was ill.
| A．that , that | B．which , that | C．why,because | D．why, that |