46.C)Its absence might suggest a lack of warmth in interpersonal relationships .
47.D)How close the communicator‘s relationships are .
48.B) They take touching as a cultural norm in social interactions.
49.A)Men can show friendship in public through physical affection.
50.D)Take other people's preference into consideration .
From climate change to the ongoing pandemic (大流行病) and beyond ，the issues facing today's world are increasingly complex and dynamic .
51.A)It faces problems that are getting more varied and compli-cated.
52.C) People are divided about the nature of interest .
53.D)How a growth mindset of interest can contribute to crossdisciplinarythinking.
54.C) Making innovative products needs multidisciplinary products.
55.B) Broadening their interests .