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| A. so that B. set up C. in order to D. whenever E. make sure |
In 1995, the FUF 1． a program called Tree Care. The purpose is to improve the health of street trees in San Francisco. The FUF’s tree experts make “house calls” to every newly-planted street tree once a month. They 2． the trees are growing well. Through Tree Care, people learn why trees are important and how to take care of them.
There are also Emergency Tree Care Volunteers at the FUF. These volunteers save young trees that have fallen or are leaning (倾斜). They set out to work 3． the FUF informs (通知) them of a tree in need.
The FUF sends newsletters to people 4． plant a love for trees in every citizen. It also offers tree tours and planting training. The FUF’s Youth Program trains teenagers like you to plant and care for trees.
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
