【正文】
to ride B. to snow。 a D. for。 a ? 4. Time _______ will return ____________. ? A. lost。 riding ? C. snowing。 exhausting ? 11. When it began ____, I was learning __ motorbike. ? A. snowing。 the C. /。 no more B. losing。 riding D. to snow。 exhausted D. exhausting。 the B. /。 no more ? C. lost。 to ride ? 12. — Have you ever been here? ? — No, this is the first time I _______. A. was B. came C. am ing D. have been ? 13.