We ________for cheap houses but haven’t found ________we like yet.
| A．are looking；one | B．have looked；it |
| C．have been looking；one | D．looked；them |
________ hard it might be, I will work it out.
| A．Whatever | B．How | C．However | D．What |
You may give this message to _________ is at office.
| A．who | B．whom | C．whomever | D．whoever |
You may have one of these; in other words, you have ______ you choose.
| A．whichever | B．what | C．no matter what | D．no matter which |
They say in many western countries a large number of beef cattle ________.
| A．are raised | B．is raised | C．is risen | D．rise |
Jenny ______ with him at that time, for I was having dinner with her in my home.
| A．can’t have been | B．mustn’t have been |
| C．must be | D．may be |