Generally speaking, ______ according to the directions, the drug has no side effect.
| A．when taking | B．when taken | C．when to take | D．when to be taken |
Thethief______whenhewasstealingawalletfromawoman.
| A．happenedtonotice | B．wastakenplacetonotice |
| C．washappenedtobenoticed | D．happenedtobenoticed |
He_____inashowerlastnightandgotwetthrough.
| A．caught | B．wascaught | C．hadcaught | D．caughtup |
Theteachertoldthestudentsthatthey______tobeusefulmentothecountry.
| A．wereallexpected | B．wereallexpecting |
| C．allwereexpected | D．allexpected |
Aftertheclass，thestudentswentoutoftheclassroomonebyone,butonlyMary______.
| A．left | B．hadleft | C．wasleaving | D．wasleft |
Ineedonemorestampbeforemycollection______.(MET1994)
| A．hascompleted | B．completes | C．hasbeencompleted | D．iscompleted |