______ the ancient Egyptians built the pyramids puzzled people for centuries.
| A．Whether | B．What | C．How | D．Where |
Mary was much kinder to Jack than she was to the others，__________，ofcourse, made all the others upset.
| A．who | B．which | C．what | D．that |
As a child, Jack studied in a villageschool，__________is named afterhisgrandfather.
| A．which | B．where | C．what | D．that |
To my parents, what __________ is the happiness oftheir children.
| A．assures | B．influences | C．matters | D．interests |
Theboy always feels lonely，__________ when no onespeaks to him.
| A．especial | B．especially | C．special | D．specially |
The manager had her __________ the papers immediately.
| A．to type | B．type | C．typed | D．typing |