In the last ten years, they _______ three great scientific experiments.
| A．finished | B．have finished | C．had finished | D．have been finished |
– _______ that made Mrs. White so upset?
– Her son’s making trouble in the school.
| A．Where was it | B．Why was it | C．How was it | D．What was it |
My sister, as well as her classmates who_____ late for class, _____criticized by Mr. Hunt.
| A．were; was | B．was; were | C．was; was | D．were; were |
______ almost all our time to our schoolwork in the past three months, we have almost no time for fun and play.
| A．Having devoted | B．Devoted | C．To devote | D．To have been devoted |
.He tried________to persuade his friends to travel with him, so he traveled alone．
| A．in store | B．in vain | C．in turn | D．in trouble |
We agreed to accept ______ they thought was the best tourist guide．
| A．whatever | B．anyone | C．whichever | D．whoever |