Nowadays people travel frequently by airplane. In-flight meals can be an importantkey in determining   (36)   the flight is pleasant. Once in a while, passengers maycomplain about the food served during the flight. It is true that food tastes “different”from that on the ground. However, airplane companies   (37)   the problem. There area few factors that contribute to this phenomenon. For a start, because of the lower cabinpressure and dry cabin air, our tongue is   (38)   to different flavors than it usually is.Likewise, our nose becomes   (39)   blocked to function well high in the sky. Inaddition to senses of smell and taste, our hearing matters too. The loud engine noise canaffect how much we enjoy our meal. Experiments have indicated that our cuisine in theclouds might taste quite   (40)   under noisy conditions.Although airlines can’t change the above factors, there are quite a few things theycan do to make in-flight food tastier. British Airways, for instance, has tried providinga nasal spray   (41)   passengers. Most airlines, however, have just added herbs andspices to bring out flavors. By doing so, the foods on the plane remain yummy   (42)   the height of our tummy. As airlines keep trying different ways to enhance taste,passengers will enjoy their flight better in the future.
【題組】36.
(A) while
(B) whether
(C) because
(D) which