—Where did you find our chemistry teacher?
—It was in the lab ______ he was doing his experiment.
| A．that | B．where | C．which | D．in which |
Between the two parts of the con-cert is an interval，__________ the audience can buy ice-cream.
| A．when | B．where | C．that | D．which |
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 |