Which sentence from paragraph 1 supports the
inference that the narrator has doubts about whether
his time machine will work?
1. "I gave it a last tap, tried all the screws again,
put one more drop of oll on the quartz rod, and
sat myself in the saddle...."
2. "I took the starting lever in one hand and the
stopping one in the other, pressed the first, and
almost immediately the second."
3. "I seemed to reel; I felt a nightmare sensation of
falling; and, looking round, I saw the laboratory
exactly as before."
4. "For a moment I suspected that my intellect had
tricked me."