【題目】閱讀下列短文，根據(jù)短文內(nèi)容填空。在未給提示詞的空白處僅填寫1個適當(dāng)?shù)膯卧~，在給出提示詞的空白處用括號內(nèi)所給詞的正確形式填空。

Nearly two decades have passed since China sent the first Beidou satellite into space in 2000. During that time, more Beidou satellites were sent into orbit (軌道), 【1】 (form) the Beidou Navigation Satellite System (BDS). In late 2012, it began providing positioning, navigation, timing and messaging 【2】 (service) to people in China and other parts of the Asia-Pacific region. At the end of 2018, BDS started to serve users worldwide. Now with two more Beidou satellites 【3】 (launch) on Dec 16, 2019, BDS has 53 satellites in orbit.

【答案】

【1】forming

【2】services

【3】launched

【解析】

這是一篇說明文。主要介紹了自2000年中國將第一顆北斗衛(wèi)星送入太空以來，已經(jīng)過去了近20年。在此期間，更多的北斗衛(wèi)星被送入軌道，形成北斗導(dǎo)航衛(wèi)星系統(tǒng)。文章還說明了從2012年底到2019年期間，北斗系統(tǒng)能提供的功能和完善情況。

【1】考查非謂語動詞。句意：在此期間，更多的北斗衛(wèi)星被送入軌道，形成北斗導(dǎo)航衛(wèi)星系統(tǒng)。分析句子結(jié)構(gòu)，form與其邏輯主語Beidou satellites之間是主動關(guān)系，用現(xiàn)在分詞作結(jié)果狀語。故填forming。

【2】考查名詞的數(shù)。句意：2012年底，該公司開始向中國和亞太地區(qū)其他地區(qū)的用戶提供定位、導(dǎo)航、定時和短信服務(wù)。service為可數(shù)名詞，根據(jù)上文positioning, navigation, timing and messaging可知此處服務(wù)不止一種，故應(yīng)用名詞復(fù)數(shù)形式。故填services。

【3】考查with復(fù)合結(jié)構(gòu)。句意：2019年12月16日，北斗系統(tǒng)又發(fā)射了兩顆北斗衛(wèi)星，現(xiàn)有53顆在軌衛(wèi)星。這里是with復(fù)合結(jié)構(gòu)，因為“北斗衛(wèi)星”和“發(fā)射”之間是被動關(guān)系，所以用with + n + 過去分詞結(jié)構(gòu)，所以填launched。

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