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Many scientists believe sea levels ______ by more than one meter by the end of the 21st century.
| A．will be risen | B．will have risen |
| C．will have been | D．will be rising |
A new library downtown. They hope to complete it by the end of this year.
| A．is being built | B．has been built |
| C．will be built | D．is building |
--- Did you telephone Uncle Sam our plan for the Christmas holidays on his farm?
--- Yes, he was happy about our arrival, and he eagerly asked when .
| A．has we arrived | B．we had arrived |
| C．were we arriving | D．we were arriving |
—Why are you so busy, Mike ?
—I ______ a novel these days.
| A．was writing | B．wrote | C．am writing | D．have written |
—This is the first time I __________ my first picture with my own hands.
—It's time that you __________ a picture for me.
| A．took; will take | B．have taken; took |
| C．took; took | D．will take; have taken |
After Jack had sent some e-mails, he _______ working on his project.
| A．had started | B．has started | C．started | D．starts |